I used approach with EnvFunction.setGlobalValue("simple",
simpleFeatureFilter ) and it worked like a charm.
One small notice, I used GUIDs instead of "simple", because in our
applications we have many renderers sometimes.
Thank you very much,
Sergey
On 05.07.2011 18:28, Jody Garnett wrote:
> In your calling code you have a choice....
>
> static ISimpleFeatureFilter SIMPLE_FILTER = ....
> Filter filter = ff.equals( ff.function( "wrapper", ff.literal(
> SIMPLE_FILTER ) ), ff.literal( Boolean.TRUE ) );
>
> 1) Your ISimpleFeatureFilter is handed as an literal and thus can be
> copied when Style needs to look at it
> 2) It does not (and your original does not) indicate to the rendering
> system what attributes it wants the feature to have; so they may not
> be requested (and the feature could be full of empty null values at
> runtime). Just so you know ...
>
> The other thing you could do is use an environment variable ...
> http://docs.geotools.org/latest/javadocs/org/geotools/filter/function/EnvFunction.html
>
> This is a good choice if you want want to change the value over time
> (perhaps as your user interacts?).
>
> EnvFunction.setGlobalValue("simple", simpleFeatureFilter );
> Filter filter = ff.equals( ff.function( "wrapper", ff.function( "env",
> "simple" ) ), ff.literal( Boolean.TRUE ) );
>
> .. later ...
>
> EnvFunction.setGlobalValue("simple", simpleFeatureFilter2 );
>
> Do you have a JIRA issue open on this topic? It would be good to
> record some ideas and actually solve this; and it would be nice if you
> can tell me if the above ideas work (perhaps I can get a blog post or
> a tutorial out of this discussion).
>
> --
> Jody Garnett
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